Toothed gearing



J.-ZE|TUN.

TooTHEn GEAmNG.

I AP`PL|CAT|0N FILED MAY 2B, .918- 153471730. Patented July 27, 1920.

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l. ZEITLIN.

T'ooTHED Gimme. l APPLICATIONYFILED MAY 28,1918.

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JosP'H ZE'ITLIN, or reinar/r', Lennon-ENGLANL .Toornnn Gnaaue. l

Application led May 28,

- To all whom t may concern Be it known that I, Josnrrr ZEITLIN, a subject of the King of Great Britain and Ireland, residing at 115 Bishopsv liishops'lark Road, Fulham, LondonfS". 7., England, have invented new and useful Improvements in Toothed Gearing', or which the followingis aspecification. l

This invention relates to toothed gearing mechanism and in particular to a type inwhich tivo or more Wheels in deiined positions have to be rotated in the same direction through another Wheel or idler andwitliin a predetermined ratio. The objectv ofthe inventionv is the construction and armii-gementl of parts of such gearing whereby problems in this' type of gear .can be solved iin a practically effective Vand e'liici'ent manner, in a more compact form than hitherto,

the engagement ofi a-lar'ger number of teetli ofthe Wheel elements is secured, andv greater mounted in or on an annulfar guide orhous-4v iii-g o'r guide rollers Which surrounds or surround it andthe said tivo Wheels and.l

This* housing maybe supported in a-tixed position or be made adjustable relative to the a-Xes'of the tivo shai'ts to allow ot the meshing of the teeth of the tivo Wheels and Y theinternally toothedring to be( regulated in amount.Y The housing may be'supported elafst'icalil'y if necessary in order to--takev up'v any shock or inequality in the driving effort. This construction enables the third element tobe Very substantially supported in its bearing by anti-friction means in such aY Way as to insure great `durability.`

In order that the invention may be the better understood I will now proceed to describe the same in relation to the accompanying drawings, reference being had to the letters and iigures marked thereon.

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Mansions,- n

Talrto mesh Spe'eiicatonrof Letters ratent. .Y July 27 1920.V

191182 serial-no1. $337,123.V

Like letters-refer to 'like parts Ythe vari- Figure 1 is a longitudinal sectional vieuT of a mechanism comprising tivo' shafts and vpin'i'ons mechanically connected by an annular element mounted in a housing-in accordance with this invention. i

Fig. 2 is a diagrammatic side vvietvof n Figs. 3 and 4 show vthe invention applied to the crank' shaft of Va reciprocating piston engine With Vdiilierential stroke as .de-V.

scribed'in the specilications ofI the United States Letters Patent Nos. 1177913 issued ah apra-191e and 11.60966 issued 16th November 1915. Y i I Fig. 5 isa diagrammatic representation illustrating theA limitations and diiiculties of the ordinary arrangement or the'annular toothed elem-ent and pinion revolving in theV saine direction. v Y

Fig.Y 6 shows thev inventionarranged with the vannular element. mountedY elastically to taire .up any inequality' in the .driving effort oradjustabllyI to regulate the nie'sh-inigl*ofV its teeth With-the pinions. Y'

Fig. 7 isa diagrammatic view of the invention arranged so' that/theannular ele-Y ment isrmoun-ted to rotate on rollers mounted oni. a fixed axis. Y

Figs. Sand 9 shoiv a' modifiedv arrangement ofFig. 6 in Which thev annular element is mounted torrevolve on sliroudings on the two'pinions and ori-a third Wheel or roller. Fig. V10 is a sectional fvieiv ot the ball races of the annular element in which one ball race is integral with the element.'

Fig.A 11 is a modiiied arrangeif'nent` in which the ball race on the annular element is formed separate therefrom.r i

Referring to Figs-1 and 2 within a housing @are rotatably mountedshaits b and c carryingv toothed pinions cl and c respectively. Geared with the pinions Z and e is l an internally toothed ring /f rotatably mounted on balls g or rollers on a race h fixed in the housing a. Vhen the shaft o Withl pinion Z- is revolvedy it drives the shaft 0' with pinion@ through the toothed revolving` ring 7L' in the same' direction.

Referring to Figs. 3, 4'- and 5 the sleeve-z' on the crank pin? j is to bei given a rotation thereon of! 1- revolution tov 2 revolutions of the casing carrying the cylinders for which purpose the small pinion Z which is driven by the casing is geared to the large pinion e by the toothed ring 7, thesleeve z' being attached to or forming apart of the pinion e, hence the sleeve rrotates once about the crank pin j tor every two revolutions. of the engine casing about the stationary crankshaft and in the same direction. ln Figa the two dotted circles a? y indicate theV pitch lines of the elements ot an ordinary arrangement to give the saine result theoretically butflig. '5 shows clearly that the pinion Z on the shaft b would overlap the other shaft c beyond the axis thereof and Yconsequently the shaft c could not be carried through as indicated in dotted lines in Fig. 5. In this case a ratio of more than 2 to l must be used if the shaft o is to be carried through and even then the shaft@ would be overhung in its bearing. ln this invention both shafts can be supported on each side and all overhang avoided. rllhef dotted pitch lines and g/ in lD l show' by comparison the oompactness of the mechanism according to this invention with that of known arrangements where such arrangement is possible. Another important advantage obtained by this invention is that lwhen therdistanoe between the axes ot the two pinions is definitely fixed the peripheral speedfor given number of revolutions per minute is much lower by the arrangement .according to this invention than with the ordinary arrangement as indi` cated by the dotted lines. Y 1 Y ln Fig. @the ring f is rotatably mounted in a frame '7c provided with stems Z adapted to slide in pockets m in the housing a "and to be acted upon by springs a disposerL in the pockets so that the frame It is loatingly supported in the housing whereby any in equality of driving effort from the pinion d to the pinion e is compensated for bythe springs rEhe normal position of the frame relative to the axes o1"- the shafts Z2 and o can be regulated if desired so as to adjust the amount of inesh of the pinions l and e with the teeth of the ring f by means of caps r screwed into the poclrets m.

ln place et the balls and ball races in F ig. 'i' the ring jj is supported on rollers g mounted on studs o lined in the housing a. 'l` he studs 0 may be provided with an eccentric portion indicated in dotted lines to af- 'ford means oi adjustment or to taire up any wear.

ln Figs. 8 and 9V the pinions Z and e and the toothed ring f are provided with shroudings p corresponding in diameter with the pitchlines of their teeth. A third pinion g or equivalently a roller is provided to form the other element on" which the ring f runs. rl`his arrangement is the internal supporting ot the ring f in contradistinction to the external supporting of it as illustrated in F ig. 7. One or more of the shroudings p are made detachable from the pinions or the ring, or both, to enable the parts to be assembled without difficulty.

l. A toothed gearing consisting of a plurality oi' pinions, an internally toothed ring embracing and engaging said pinions, a housing for rotatably supporting said ring to enable'itpto revolve when motion is being transmitted through same to or from one pinion to another, antiiiriction devices adapted to support said ring in said housing so'that the ring can revolve and transmitY motion from one pinion to another pinion, the said pinions being rotatably mounted adjacent to and independent of said housing, and means whereby the said housing` is rela tively movable to said pinions so that the ring and the pinions can be adjusted relatively to one another, substantially as :lescribed.

2. A toothed-gearing consisting ol a plu4 rality of pinions, an internally toothed ring embraciiw and engaging said pinions, a iousing ror rotatably supporting said ring to enable it to revolve when motion is being transmitted through the same to or yfrom one pinion to another, antitriction devices adapted to support said ring in said housing so that the said ring can revolve and transw mit motion from one pinion to .another pinion, a frame in which the said pinions are rotatably mounted, and in which the said housing is movable relative to said pinions` so that the ring and the pinions can be adjusted relatively to one another, and an elastic resistance in association with said frame adapted to permit any inequality of driving effort through the gearing to be compensated for, substantially as described.

8. A toothed gearing consisting of a plurality of pinions, an internally toothed ring embracing and engaging said pinions, a housing for rotatably supporting said ring to enable it to revolve when motion is being transmitted through same to or from one pinion to another, antifriction devices adapted to support said ring in said housing so that said ring can revolve and transmit motion from one pinion to another pinion, theV said pinions being rotatably mounted in said housing, and shroudings on the ring and on a plurality of pinions adapted to inlternally support said ring and allow of its rotation about its axis, substantially as described.

.ln testimony whereof I have signed. my name to this specification in the presence of two subscribing witnesses- JOSEPH ZElTLIN. lVitnesses:

Doius HITCHCOCK, vWALTER CARVER. 

